feat: api

[KTrain5169]

here we go again!

this time though I know most of my way around

not even gonna bother using closing keywords

remaining tasklist:

• Implement companion disconnect left for later (if at all), workaround is simply to disable the extension
• add a dev-only command to test the UI by adding a dummy companion replace with Integration tests extension
• give the UI its own view ID
• Implement uses for the remaining contribution points except images
  • Cursor
  • Action management
  • Action injection
  • Action force
  • Context
  • Changelog
  • Action processing
• Polish implementation of action injections
• Implement more utils relating to diffs
  • document calculateDiff (@Pasu4)
  • document applyDiffHighlighting
• Add JSDoc annotations for utils
• Update documentation site (TODO: Starlight TypeDoc plugin)
• Dev tools
  • Dev CLI (can be done anytime)
  • Integration tests extension (do in RC phase)
• Template repo (@Pasu4)
• Split out Git & Copilot Chat functionality (do after the API types package is released)
  • Git
  • Copilot Chat (@Pasu4) (blocked by [API] Expose more things #297)
• Changelog
  • NeuroPIlot changelog
  • API changelog
  • Changelog for other extensions (cc: @Pasu4)
• Publish packages to npm
  • API types
  • Dev CLI
• Basic unit test suite

[KTrain5169]

absolute pain trying to figure out build system